[Xmonad] possible bug in tabbed window extension

[Michael Vanier]

I've just upgraded to the latest xmonad in darcs, and it's great!  However, one thing that used to 
work doesn't work anymore.  I bind mod-button3 to the kill command, and when I put the cursor on a 
tab and hit mod-button3 the entire X server crashes!  When I do it outside of a tab it works fine. 
FWIW the relevant part of my Config.hs is:

-- |
-- default actions bound to mouse events
--
mouseBindings :: M.Map (KeyMask, Button) (Window -> X ())
mouseBindings = M.fromList $
     -- mod-button1 %! Set the window to floating mode and move by dragging
     [ ((modMask, button1), (\w -> focus w >> mouseMoveWindow w))
     -- mod-button2 %! Set the window to floating mode and resize by dragging
     , ((modMask, button2), (\w -> focus w >> mouseResizeWindow w))
     -- mod-button3 %! Kill a window
     , ((modMask, button3), (\_ -> kill))
     -- Extension-provided mouse bindings
     ]

Anybody have any idea what's going wrong?

TIA,

Mike